On 10/12/2015 11:21 PM, Arnd Bergmann wrote:
On Monday 12 October 2015 23:20:19 John Garry wrote:
+int hisi_sas_ioremap(struct hisi_hba *hisi_hba)
+{
+ struct platform_device *pdev = hisi_hba->pdev;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hisi_hba->regs = devm_ioremap(dev,
+ res->start,
+ resource_size(res));
+ if (!hisi_hba->regs)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ hisi_hba->ctrl_regs = devm_ioremap(dev,
+ res->start,
+ resource_size(res));
+ if (!hisi_hba->ctrl_regs)
+ return -ENOMEM;
+
+ return 0;
+}
static const struct of_device_id sas_of_match[] = {
Better use devm_ioremap_resource() here, which registers the resource so they
are checked for conflicts and listed in /proc/iomem.
Yes, hisi_hba->regs can use devm_ioremap_resource.
However ctrl_regs have to use devm_ioremap, since the address are
sharing among different nodes, unfortunately, and devm_ioremap_resource
will fail.
Thanks
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